def evaluate_security_policy(policy):
    """
    评估安全策略
    :param policy: 安全策略
    :return: 评估结果
    """
    evaluation = {
        "encryption": policy["encryption"],
        "access_control": policy["access_control"],
        "backup": policy["backup"],
        "monitoring": policy["monitoring"]
    }
    return evaluation

# 示例
policy = define_security_policy()
evaluation = evaluate_security_policy(policy)
print(f"Policy evaluation: {evaluation}")